M-MLV Reverse Transcriptase, RNaseH⁺
(MMLV-RT RNase H⁺, 50,000U)
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50,000 units (200 unit/㎕)
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M-MLV (Moloney Murine Leukemia Virus) Reverse Transcriptase is an RNA-dependent DNA polymerase that can be used in first strand cDNA synthesis using total or poly A⁺ RNA as templates. M-MLV Reverse Transcriptase is purified from a recombinant E.coli clone that carrying pol gene of M-MLV and consists of a single subunit with a molecular weight of 71 kDa. The RNase H activity of M-MLV Reverse Transcriptase is weaker than the commonly used Avian Myeloblastosis Virus (AMV) reverse transcriptase.

Storage Buffer
- 200 unit/μl in 20 mM Tris-HCl, pH7.5, 200 mM NaCl, 0.1 mM EDTA, 1 mM DTT, 0.01% NP-40, and 50% Glycerol.

Unit Definition
- One unit is the amount of enzyme required for incorporation of 1 nmole of dNTP into acid-insoluble material for 10 min at 37℃.

5x Reaction Buffer
- 250 mM Tris-HCl, pH 8.3, 375 mM KCl, 15 mM MgCl₂, 50 mM DTT.

QC tests
- Activity, SDS-PAGE purity, endonuclease activity test, performance tests.

Storage Condition
- Store at -20℃.

Heat Inactivation
- M-MLV reverse transcriptase can be inactivated by incubation at 90°C for 10 min.

First Strand cDNA Synthesis

1. Add 1 ㎕ of 100 pmol/㎕ primer (random hexamer or oligo d(T)15) or 10 pmol/㎕ of gene specific anti-sense primer per microgram of the total RNA sample in a total volume of ≤10 ㎕ in nuclease-free water.
2. Heat the tube to 70°C for 5 min to melt secondary structure within the RNA template.
3. Cool the tube immediately on ice, then spin briefly to collect the solution at the bottom of the tube.
4. Add the followings to the primer/RNA mix in the order shown.
M-MLV 5X Reaction Buffer 4 ㎕
dNTP mix (2.5 mM each) 4 ㎕
M-MLV RT 200 units 1 ㎕
Add nuclease-free DW to final volume of 20 ㎕
5. Mix gently by flicking the tube, and incubate for 60 min at 37°C or 42°C.
6. To stop reaction, incubate for 5 min at 94°C.

• The cDNA by reverse transcription can be used for subsequent PCR reactions and for the cDNA library constructions.
• If there is concern about possible RNase contamination in the reaction, Recombinant RNase Inhibitor may be added to the reaction to preserve RNA integrity.

1. Add the following components to the PCR tubes (for 20 ㎕ total reaction).
10x PCR Buffer 2 ㎕
dNTP mix (2.5 mM each) 1.6 ㎕
Primers (10 pmol/㎕) 0.5 ㎕ each
cDNA by RT reaction 0.1-1 ㎕
Taq (5 unit/㎕) 0.2 ㎕
Add nuclease-free DW to final volume of 20 ㎕


First strand cDNA synthesis from total RNA or polyA⁺ RNA, Primer extension, RT-PCR 

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